Women's ASICS® GEL-KAYANO® 21: Get ready to be wowed by the latest upgrade of an already amazing shoe - the Women's ASICS® GEL-Kayano® 21. Just when you thought this legendary running shoe couldn't get any better, ASICS® has upped the ante with an improved FluidRide™ technology that reduces weight by 15% and enhances bounce back by 20%. You'll be cruisin' smooth and strong through every transition thanks to the new heel construction, and the new ComforDry™ Sockliner that will provide you with 40% more bounce back and 40% more durability than a standard Ortholite sockliner. 8.9 ounces